Weather is probably a major factor when you plan your trip to Los Angeles, and keep in mind that cheaper options are usually available when the weather isn't as good. The hottest months are usually January and February with an average temp of 66°F, while the coldest months are July and August with an average of 47°F. The rainiest months in Los Angeles are June, July, August, and May, with each month seeing an average of 9 inches of rainfall.